Changes between Version 1 and Version 2 of TBR/Review/Debugging/Start

Timestamp:

Oct 4, 2005, 7:49:01 PM (15 years ago)

Author:

JoelSherrill

Comment:

/* How much memory is left in the C Program Heap? */

TBR/Review/Debugging/Start

@@ -48 +48 @@
 
 {{{
-  (gdb) p '''((Region''Control ''')''Region''Information->local''table<nowiki>[</nowiki>1])->Memory->first
-  $9 <tt> {back''flag </tt> 1, front''flag <tt> 8058280, next </tt> 0x7ea5b4, previous = 0x7ea5b0}
+  (gdb) p ((Region_Control *)_Region_Information->local_table[1])->Memory->first
+  $9 {back_flag=1, front_flag=8058280, next=0x7ea5b4, previous=0x7ea5b0}
 }}}
 
 Let's look at that gdb command in more detail.
 
- * ''Region''Information_ contains the information used to manage Region objects.
- * ''Region''Information->local_table is the object pointer table for Regions.  It is
+ * ''_Region_Information'' contains the information used to manage Region objects.
+ * ''_Region_Information->local_table'' is the object pointer table for Regions.  It is
   indexed by the ''object index'' portion of the object ID.
- * ''Region''Information->local''table<nowiki>[</nowiki>1] points to the first Region object.  It is of type ''(Region''Control *)''.
- * ((Region''Control *)''Region''Information->local''table<nowiki>[</nowiki>1])->Memory points to the Heap control portion of this Region's control block.
- * '''((Region''Control ''')''Region''Information->local''table<nowiki>[</nowiki>1])->Memory->first references the contents of the first ''heap block'' on this Heap.
+ * ''Region_Information->local_table'' points to the first Region object.  It is of type ''(Region_Control *)''.
+ * ''((Region_Control *)_Region_Information->local_table[1])->Memory'' points to the Heap control portion of this Region's control block.
+ * ''((Region_Control *)_Region_Information->local_table[1])->Memory->first'' references the contents of the first ''heap block'' on this Heap.
 
-Notice that the ''front''flag'' is displayed as ''8058280''.  This is in decimal since we used ''p'' not ''p/x'' to gdb.  Since this number is even, we know the ''in use bit_ is 0 and the block is free.  Thus the first block on the heap is 8,058,280 bytes and there are at least that many bytes left.
+Notice that the ''front_flag'' is displayed as ''8058280''.  This is in decimal since we used ''p'' not ''p/x'' to gdb.  Since this number is even, we know the in use bit is 0 and the block is free.  Thus the first block on the heap is 8,058,280 bytes and there are at least that many bytes left.
 
 '''NOTE:''' This is really a crude estimate.
@@ -114 +114 @@
      $free, $numfree
  end
-
 = How much memory is left in the RTEMS Workspace? =